15-pack Gx24q to E26 Lamp Base Converter,15.5mm 4pin,gx24q to E26 Adapter,Lamp Holder Converter, Rohs, Z1001 This is 4P, NOT FOR 2P;Need BYPASS OR REMOVE the ballast, otherwise, it doesn't light on. G24q Series (Female Socket Fixture) to E26 (Male Bulb Base) Adapter - Q series has a shorter tip than D series and is more common in the US. Suit for G24Q-1, G24Q-2.G24Q-3, GX24q-1,GX24q-2,GX24q-3 socket,Works for 4-Pin CFL with G24q-1 Base:10w 13w Quad Tube; GX24q-1 Base:10w 13w Triple Tube;G24q-2 Base:18w Quad Tube;GX24q-2 Base:18w Triple Tube;G24q-3 Base:26w 32w Quad Tube;GX24q-3 Base:26w 32w Triple Tube; If your socket is 2P, buy: https://www.amazon.com/dp/B017T1UJEE Physically change the contact. THE BALLAST IN YOUR FIXTURE MUST BE REMOVED OR BYPASSED FOR THESE ADAPTERS TO FUNCTION PROPERLY. CONSULT AN ELECTRICIAN IF YOU ARE UNSURE. DO NOT OPERATE A LED BULB WITH A BALLAST IN THE FIXTURE, DOING SO WILL LIKELY DAMAGE THE BULB. All pin-based CFL, like GX24Q G24d Gx24d GX23 G23 are lamp-ballast separated, but all screw-in E26 E27 are lamp-ballast integrated. ballast is a must to start a high voltage(600V-1500V 1ms) to light up the CFL, but it is dangerous for LED Lamp. Because LED Lamp are built with LEDs and Driver which is transforming the 100-240V AC to DC for LEDs. So the LED Driver input should be 100V-240V or 85-265V, so 600-1500V will be too high, and easily destroy the led lamp. There are some LED Driver who can be compatible with the ballast, no LED Driver can be compatible with all the ballast. So the best thing is bypass or remove once we want to change CFL to LED Lamp. When we remove pin-based CFL, we only removed the lamp, the ballast is still working in front fixture; even we change to E26/E27 CFL, there will be 2 ballasts, the light will not work.